Working board for washing machine



FIG. 1 is a perspective view of a working board for washing machine showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof where the right side view is a mirror image;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is an environmental perspective view thereof.

The environmental structure illustrated in broken line form in FIG. 7 forms no part of the claimed design. 

The ornamental design for a working board for washing machine, as shown and described. 